Crossbow Limb Combining and Fixing Structure

ABSTRACT

A crossbow limb combining and fixing structure includes a body and a limb, and a receiving slot is formed at a front end of the body and provided for accommodating and installing the limb. The limb and the body are crossed to form a cross shape. The body has a releasable fixing member installed at a position opposite to the receiving slot, and the fixing member is provided for fixing the limb to the body by clamping and forcing. A slide is formed on a bottom side of the body, and a carriage is slidably combined with the slide and capable of slidably closing and opening the receiving slot. The limb is in an arc shape, and a bowstring is combined between both ends of the limb. This structure improves the safety of use and the convenience of assembling and replacing the limb.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a crossbow structure, and more particularly to a crossbow body and limb combining and fixing structure.

Description of the Related Art

In general, a conventional crossbow is formed by a body and a limb, and a stock is disposed at a rear end oformed by combining and fixing structure.y cting plate of a male base body in accordance with a preferred emboimen the body, and a trigger mechanism is installed on a side of the stock, and the limb is substantially in an arc shape and installed near a front end of the body and crossing the body to form a cross shape, and a bowstring is combined between both ends of the limb, such that when the crossbow is used, the bowstring is pulled backward, so that the bowstring is tense and latched with the trigger mechanism, and then an arrow is put on the body and attached to the stretched bowstring, and the trigger mechanism is pressed to shoot the arrow by the bowstring. However, the limb is installed and fixed to the body directly, so that a simple and easy installation or uninstallation cannot be achieved effectively, and it is inconvenient to transport and store such conventional crossbow and repair or replace the limb of the crossbow.

Therefore, some manufacturers developed a crossbow limb combining and fixing structure comprising a body 10 and a limb 20 as shown in FIGS. 7 and 8, wherein the body 10 is long-rod shaped and extended along a front-and-rear direction and has a front end 101, and a pocket 102 is formed near a front end 101 of the body 10 and provided for accommodating the limb 20, and the body 10 has a releasable fixing member 103 disposed at a position opposite to the pocket 102 and provided for fixing the limb 20 to the body 10 by clamping and forcing, and the body 10 has a pivoting latch 104 disposed near the pocket 102 and capable of pivotally closing and opening the pocket 102. When the latch 104 closes the pocket 102, a screw member 105 is secured to limit the limb 20 in the pocket 102; and when the latch 104 opens the pocket 102, the limb 20 may be installed into the pocket 102 or removed from the pocket 102, and the limb 20 is substantially in an arc shape.

Although the conventional crossbow limb combining and fixing structure provides a simple and easy way of installing or uninstalling the limb 20 and the body 10 to overcome the drawbacks of the conventional crossbow including the inconvenient installation and uninstallation, transportation and storage, and repair and replacement of the limb 20. However, when the latch 104 closes the pocket 102, a screw member 105 is secured directly, so that if the screw member 105 is loosened or fallen off, the limb 20 and the body 10 may be separated. In addition, when the limb 20 and the body 10 are installed, it is necessary to accommodate the limb 20 into the pocket 102 of the body 10 and use the latch 104 to pivotally close the pocket 102, and hold the latch 104 by one hand and screw the screw member 105 by the other hand. Obviously, such operation is very inconvenient to assemble and replace the limb 20.

SUMMARY OF THE INVENTION

The present invention provides a crossbow limb combining and fixing structure comprising a body and a limb, characterized in that the body is long-rod shaped and extended along a front-and-rear direction and has a front end and a rear end, and a receiving slot is formed near the front end of the body, and a releasable fixing member is installed at the body and opposite to the receiving slot, and the fixing member is provided for fixing the limb to the body by clamping and forcing, and a slide is formed on a bottom side of the body and extended from the front end to the rear end and passing through the receiving slot, and the slide is slidably combined with a carriage, and the carriage is capable of slidably closing or opening the receiving slot, such that when the carriage opens the receiving slot, the limb may be installed into the receiving slot or removed from the receiving slot; and the limb is substantially in an arc shape, and a bowstring is combined between both ends of the limb.

Therefore, it is a primary objective of the present invention to provide a slide formed on the carriage and slidably combined with the body, so that the carriage can be securely close the receiving slot, so as to prevent the limb and the body from being separated and improve the safety of use.

Another objective of the present invention is to accommodate the limb into the receiving slot of the body when the limb and the body are installed, and to slide the carriage on the slide to close the receiving slot, and then use both hands to fix the carriage and the body, so as to provide a simple and easy way of installing and replacing the limb.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a crossbow of the present invention;

FIG. 2 is an exploded view of a crossbow of the present invention;

FIG. 3 is a side view of a front end of a crossbow body of the present invention;

FIG. 4 is a partial sectional view of a crossbow of the present invention;

FIG. 5 is a perspective view showing the action of sliding a carriage to open a receiving slot in accordance with the present invention;

FIG. 6 is a sectional view showing the action of sliding a carriage to open a receiving slot in accordance with the present invention;

FIG. 7 is a planar view of removing a limb of a conventional crossbow and latching and pivoting the limb to open a pocket; and

FIG. 8 is a planar view of installing a limb to a body of a conventional crossbow and latching and pivoting the limb to close a pocket.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference to FIGS. 1 to 4 for a crossbow limb combining and fixing structure in accordance with the present invention, the crossbow limb combining and fixing structure comprises a body 1 and a limb 2, wherein the body 1 is long-rod shaped and extended along a front-and-rear direction and has a front end 1A and a rear end 1B, and a receiving slot 11 is formed near the front end 1A of the body 1, and the receiving slot 11 has an opening 111 facing downward, and a through hole 12 is formed at the front end 1A of the body 1 and communicated with the receiving slot 11, and the through hole 12 has an inner thread 121 formed therein, and the receiving slot 11 has two pads 112 installed therein and a compressing plate 113 disposed between the two pads 112 and the through hole 12, and a releasable fixing member 13 is installed in the through hole 12, and the fixing member 13 has an outer thread 131 screwed and engaged with the inner thread 121 of the through hole 12, and the fixing member 13 is extendable into the receiving slot 11. In addition, the body 1 has a slide 14 formed on a bottom side of the body 1 and extended from the front end 1A to the rear end 1B and passed through the receiving slot 11, and a carriage 15 is slidably combined with the slide 14 and capable of slidably closing and opening the receiving slot 11, and the body 1 has at least one combining hole 16 formed at the front end 1A of the body 1, and the combining hole 16 has an inner thread 161, and the carriage 15 has at least one mounting hole 151 formed thereon, and a screw member 17 is passed into the mounting hole 151 and screwed and engaged with the outer thread 171 of the combining hole 16inner thread 161, and the carriage 17 is combined with a stampede frame 18 which is substantially a frame with a rear end combined with both sides of the carriage 17. In addition, a limit structure is installed between the carriage 15 and the body 1 for limiting the carriage 15 from sliding and separating from the slide 14, and the limit structure includes a stopper pin 19 and a limit groove 152, and the stopper pin 19 is installed on a bottom side of the front end 1A of the body 1, and the limit groove 152 is formed on a top side of the carriage 15, and a section of the stopper pin 19 is extended into the limit groove 152 and slides in the limit groove 152, and the stopper pin 19 is provided for limiting the carriage 15 from sliding and separating from the slide 14, and the limb 2 is substantially in an arc shape, and a bowstring 21 is combined between both ends of the limb 2.

With reference to FIGS. 5 and 6 for the installation or replacement of the limb 2 of the present invention, the fixing member 13 is loosened to separate from the receiving slot 11 of the body 1, and the screw member 17 is loosened to separate from the combining hole 16 of the body 1, and the carriage 15 is slid to open the receiving slot 11 of the body 1. By limiting the stopper pin 19 and the limit groove 152, the carriage 15 is prevented from separating from the slide 14, and the desired installing or replacing limb 2 is put into the receiving slot 11 through the opening 111 and between the two pads 112, and the bowstring 21 is disposed at the top of the body 1, and the fixing member 13 is rotated and extended into the receiving slot 11 to push the compressing plate 113, and the compressing plate 113 and the two pads 112 are used to clamp and position the limb 2, so that the limb 2 and the body 1 are crossed with each other to form a cross shape, and then the carriage 15 is slid to close the receiving slot 11 of the body 1, and the outer thread 171 of the screw member 17 and the inner thread 161 of the combining hole 16 of the body 1 are screwed and engaged to install the limb 2 and the body 1 or complete the replacement of the limb 2.

The structure in accordance with the aforementioned embodiments of the present invention has the following advantages and effects.

1. In the present invention, the carriage 15 is slidably combined with the slide 14 of the body 1, so that when the screw member 17 used for securing the carriage 15 with the body 1 is loosened or fallen out, the carriage 1 still closes the receiving slot 11 of the body 1 to prevent the limb 2 and the body 1 from being separated, so as to improve the safety of use.

2. In the present invention, when the limb 2 and the body 1 are installed or the limb 2 is replaced, the desired installing or replacing limb 2 is accommodated into the receiving slot 11 of the body 1, and the carriage 15 is slid on the slide 14 and to a predetermined position to close the receiving slot 11, and then the screw member 17 is screwed by using both hands to fix the carriage 15 and the body 1, so as to provide a simple and easy way of installing and replacing the limb 2.

While various embodiments in accordance with the present invention have been shown and described, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention. 

1. A crossbow limb combining and fixing structure, comprising: a body; a limb, wherein the body is long-rod shaped and has a front end and a rear end extended from the front end along a front-and-rear direction; a receiving slot formed near the front end of the body; a releasable fixing member installed at the body and opposite to the receiving slot, wherein the fixing member fixes the limb to the body by clamping and forcing; a slide formed on a bottom side of the body and extended from the front end to the rear end and passing through the receiving slot; a carriage slideably combined with the slide for slideable movement in the front-and-rear direction, wherein the carriage slidably closes or opens the receiving slot, such that when the carriage opens the receiving slot, the limb may be installed into the receiving slot or removed from the receiving slot, wherein the limb is substantially in an arc shape; and a bowstring combined between both ends of the limb.
 2. The crossbow limb combining and fixing structure according to claim 1, wherein when the carriage closes the receiving slot, a screw member extends perpendicular to the front-and-rear direction through the carriage and is screwed and locked with the body for limiting the limb in the receiving slot, and wherein when the carriage opens the receiving slot, the screw member extends into the carriage but not into the body.
 3. The crossbow limb combining and fixing structure according to claim 2, wherein the body has a combining hole formed at the bottom side of the front end of the body, wherein the combining hole has an inner thread, wherein the carriage has a mounting hole, and wherein the screw member is passed in the mounting hole and has an outer thread screwed and engaged with the inner thread of the combining hole to secure the carriage with the body.
 4. The crossbow limb combining and fixing structure according to claim 1, further comprising a limit structure installed between the carriage and the body for limiting and preventing the carriage from sliding and separating from the slide.
 5. The crossbow limb combining and fixing structure according to claim 4, wherein the limit structure includes a stopper pin and a limit groove, wherein the stopper pin extends perpendicular to the front-and-rear direction and is disposed on the bottom side of the front end of the body, wherein the limit groove extends parallel to the front-and-rear direction and is formed on a top side of the carriage, and wherein a section of the stopper pin is extended into the limit groove and slides in the limit groove.
 6. The crossbow limb combining and fixing structure according to claim 1, wherein the receiving slot of the body has an opening facing downward.
 7. The crossbow limb combining and fixing structure according to claim 1, wherein the front end of the body has a through hole extending parallel to the front-and-rear direction and communicated with the receiving slot, wherein the through hole has an inner thread formed therein, wherein the receiving slot of the body has two pads installed therein and a compressing plate disposed between the two pads and the through hole, wherein the fixing member is passed through the through hole parallel to the front-and-rear direction, wherein the fixing member has an outer thread screwed and engaged with the through hole inner thread, wherein the fixing member is extendable into the receiving slot to push the compressing plate, and wherein the compressing plate and the two pads are provided for clamping and positioning the limb. 